apt update looks for source not listed in sources.list or sources.list.d or anywhere in /etc/apt/

In Ubuntu Studio 22.10 and 22.04.1 LTS Every time I run apt, especially apt update I find it has looked for a source that does not exist anywhere in /etc/apt/ directories or files therein. At first this was just a puzzling irritant but now Ubuntu Studio Discovery is delayed as much as 3 minutes opening apparently looking for the same source.

$ sudo apt update
Hit:1 http://us.archive.ubuntu.com/ubuntu kinetic InRelease
Hit:2 http://us.archive.ubuntu.com/ubuntu kinetic-updates InRelease
Get:3 http://us.archive.ubuntu.com/ubuntu kinetic-backports InRelease [99.9 kB]
Hit:4 http://security.ubuntu.com/ubuntu kinetic-security InRelease
Ign:5 http://archive.canonical.com/ubuntu kinetic InRelease
Err:6 http://archive.canonical.com/ubuntu kinetic Release            <<---!!
  404  Not Found [IP: 2620:2d:4000:1003::111 80]
Hit:7 https://ppa.launchpadcontent.net/tatokis/alarm-clock-applet/ubuntu kinetic InRelease
Reading package lists... Done
E: The repository 'http://archive.canonical.com/ubuntu kinetic Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.

I tried the various recommendations for sudo ppa-purge and sudo apt-get install ppa-purge and received results indicating they failed because they could not find the package to purge.

Checking "Software Sources" I found this source was not listed under any of the tabs. I then looked in each directory and file in /etc/apt/ and again found no sign of this "http://archive.canonical.com/ubuntu kinetic Release"

So the questions are "Where is apt finding the directive to look for this?" and "How do I remove it, so apt does not continue looking for it?"

Below is a log of the directories and files I searched to confirm that "http://archive.canonical.com/ubuntu kinetic Release" is not listed in the Ubuntu Sources or in /etc/apt/.

Contents of apt sources.list

$ inxi -r
Repos:
  Active apt repos in: /etc/apt/sources.list
    1: deb http://us.archive.ubuntu.com/ubuntu/ kinetic main restricted
    2: deb http://us.archive.ubuntu.com/ubuntu/ kinetic-updates main restricted
    3: deb http://us.archive.ubuntu.com/ubuntu/ kinetic universe
    4: deb http://us.archive.ubuntu.com/ubuntu/ kinetic-updates universe
    5: deb http://us.archive.ubuntu.com/ubuntu/ kinetic multiverse
    6: deb http://us.archive.ubuntu.com/ubuntu/ kinetic-updates multiverse
    7: deb http://security.ubuntu.com/ubuntu/ kinetic-security main restricted
    8: deb http://security.ubuntu.com/ubuntu/ kinetic-security universe
    9: deb http://security.ubuntu.com/ubuntu/ kinetic-security multiverse
    10: deb http://us.archive.ubuntu.com/ubuntu/ kinetic-backports main restricted universe multiverse
    11: deb http://archive.canonical.com/ubuntu/ kinetic partner
  Active apt repos in: /etc/apt/sources.list.d/tatokis-ubuntu-alarm-clock-applet-kinetic.list
    1: deb https://ppa.launchpadcontent.net/tatokis/alarm-clock-applet/ubuntu/ kinetic main

I searched in /etc/apt/and sub directories for http://archive.canonical.com/ubuntu kinetic Release

g905:/etc/apt$ ls
apt.conf.d   keyrings       sources.list   sources.list.d  trusted.gpg.d
auth.conf.d  preferences.d  sources.list~  trusted.gpg
g905:/etc/apt$ cd trusted.gpg.d
g905:/etc/apt/trusted.gpg.d$ ls
tatokis-ubuntu-alarm-clock-applet.gpg   ubuntu-keyring-2012-cdimage.gpg
tatokis-ubuntu-alarm-clock-applet.gpg~  ubuntu-keyring-2018-archive.gpg
g905:/etc/apt/trusted.gpg.d$ cd ..
g905:/etc/apt$ ls
apt.conf.d   keyrings       sources.list   sources.list.d  trusted.gpg.d
auth.conf.d  preferences.d  sources.list~  trusted.gpg
g905:/etc/apt$ cd sources.list.d
g905:/etc/apt/sources.list.d$ ls
tatokis-ubuntu-alarm-clock-applet-kinetic.list
g905:/etc/apt/sources.list.d$ cd ..
g905:/etc/apt$ cd apt.conf.d
g905:/etc/apt/apt.conf.d$ ls
01autoremove     20archive   50appstream     60icons-large    99update-notifier
01-vendor-ubuntu 20auto-upgrades 50command-not-found   60icons-large-hidpi
10periodic       20dbus          50unattended-upgrades 70debconf
15update-stamp   20packagekit    60icons               88libdvdcss-pkg
20apt-esm-hook.conf 20snapd.conf 60icons-hidpi         99synaptic
g905:/etc/apt/apt.conf.d$ cd ..
g905:/etc/apt$ cd auth.conf.d
g905:/etc/apt/auth.conf.d$ ls [Empty]
g905:/etc/apt/auth.conf.d$ cd ..
g905:/etc/apt$ cd preferences.d
g905:/etc/apt/preferences.d$ ls [Empty]
g905:/etc/apt/preferences.d$ cd ..

Again to be clear; Where else can it be? and If more than just deleting the folder or file, How can I delete it.

Platform details
Operating System: Ubuntu Studio 22.10
KDE Plasma Version: 5.25.5 
KDE Frameworks Version: 5.98.0 Qt Version: 5.15.6 
Kernel Version: 5.19.0-1018-lowlatency (64-bit) 
Graphics Platform: X11 
Processors: 24 × AMD Ryzen 9 7900X 12-Core Processor  
Memory: 31.1 GiB of RAM  
Graphics Processor: llvmpipe 
Manufacturer: MicroElectronics Product Name: G905 System Version: 1.0